Interesting idea, but lacks a few things.

The positure is almost right, well, almost. When drawing any creature, you might want to start with setting up shapes, and most importantly, the skeleton, to figure out how he could be positioned. Here you got him mostly right, but with the rear legs there seems to be some problems. He is supposed to trot down from that cliff, body bent, the rear part partly facing us. At least this is what the legs suggest. You drew the hind-left leg's paw facing us which is impossible at ferals if the rear of their body sides with us: the four-legged skeleton does not permit this.

The idea of the background is not bad, but then you would have to make the cheetah a silhouette: if the Sun shines from behind, nothing illuminates the front except some diffused light. This case the diffused light would be too weak in contrast to the Sun in the background, so the whole shape would appear as black, except a fuzzy well-illuminated outline (This can get very artistic! :) ) as the sunlight strikes through the fur. The cheetah, and everything would cast long shadows the same time (If you want to see some such image, look at my user page, the "featured submission").

Don't get this wrong: I don't want to turn you from drawing, just constructive criticism, what you asked for above - hope it helps becoming better next time ;)